To Do is a very simple task management app for the iPhone that allows you to just keep track of what you need to do in the most basic way. You won't be doing anything to complex with this app unfortunately, as it's a simple and straight forward program with really no frills.
Your options in To Do are very simple: Edit or Add. In the Add function you create a new task by entering in the name, a short description (optional) and then setting the priority of the event. Your options are Soon, Important, Urgent, or Completed. With Edit you can either delete the task or move it around on your list.
Unfortunately edit doesn't allow you to change the status of your task, meaning that once you've set it the only option is to delete it. That makes the Completed status kind of confusing when you can't really change a tasks status to completed. This would be a great feature for an app like this to have, but at least the priorities are color coded!
To Do is just a bit too simple of a task management app for the iPhone. There are other options out there that are far more useful then this app, considering they let you go back and change your entries. Plus, you'd have to really sit down and load all your events into this app for it to even be marginally useful.